Update 2013-12-19-how-to-learn-vim.md

Slight changes + paragraph on how to navigate the help hyperlinks
Merge branch 'patch-4' of github.com:davetron5000/x--x into davetron5000-patch-4

* 'patch-4' of github.com:davetron5000/x--x:
  Update 2013-12-19-how-to-learn-vim.md